CN207117520U - A kind of electricity-saving control cabinet of motor - Google Patents
A kind of electricity-saving control cabinet of motor Download PDFInfo
- Publication number
- CN207117520U CN207117520U CN201721091209.9U CN201721091209U CN207117520U CN 207117520 U CN207117520 U CN 207117520U CN 201721091209 U CN201721091209 U CN 201721091209U CN 207117520 U CN207117520 U CN 207117520U
- Authority
- CN
- China
- Prior art keywords
- voltage
- motor
- electricity
- triode
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Motor And Converter Starters (AREA)
Abstract
A kind of electricity-saving control cabinet of motor, described motor is three-phase AC asynchronous motor, it includes fuse, the main contacts of A.C. contactor of each phase sequence connection, electricity-saving appliance is connected between the main contacts of A.C. contactor and the phase winding of motor, the structure of each electricity-saving appliance is identical；The phase current i of motor is converted to corresponding voltage by current transformer in electricity-saving appliance, full wave voltage Ui is obtained after the rectified circuit rectifies of the voltage, full wave voltage Ui obtains smooth filtering voltage VD1 by filtering, to obtaining a reference voltage Ug after filtering voltage VD1 partial pressures, full wave voltage Ui is compared with reference voltage Ug, when full wave voltage Ui trailing edge or rising edge are less than reference voltage Ug, produce the pulse signal of triggering bidirectional triode thyristor, when the power factor of motor reduces, reduce the angle of flow of controllable silicon, the terminal voltage of motor reduces, the power factor of motor rises.It economizes on electricity up to 20%.
Description
Technical field
A kind of electricity-saving control cabinet of motor is the utility model is related to, it leads to according to loading condition during motor running
Controllable silicon is crossed to adjust the terminal voltage of motor, reaches economize on electricity purpose.
Background technology
The electricity-saving control cabinet of motor generally comprises fuse, A.C. contactor and electricity-saving appliance；Wherein its knot of electricity-saving appliance
Structure generally comprises controllable silicon, phase detecting circuit, comparison circuit, triggers circuit and working power, wherein phase detecting circuit
For detecting the phase between supply voltage and motor current, phase detecting circuit includes current transformer, step-down transformer
And some electronic components；For comparison circuit by phase signal compared with a setting value, triggers circuit is defeated according to comparative result
Go out to trigger the trigger signal of controllable silicon, working power will be set in addition, and operating voltage is provided for comparison circuit, triggers circuit.This
The structure of class electricity-saving appliance is more complicated, and production cost is high, is unfavorable for promoting.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of electricity-saving control cabinet of motor, the knot of its electricity-saving appliance
Structure is simple, and the electronic component used is few, and has preferable power savings.
The technical solution of the utility model is a kind of electricity-saving control cabinet of motor, for controlling the operation of motor, institute
The motor stated is three-phase AC asynchronous motor, and it includes fuse, the main contacts of A.C. contactor of each phase sequence connection,
Electricity-saving appliance is connected between the main contacts of A.C. contactor and the phase winding of motor, the structure of each electricity-saving appliance is identical；
It is characterized in that described electricity-saving appliance includes bidirectional triode thyristor SCR, current transformer LH and triggering controlled silicon conducting
Triggers circuit, current transformer LH primary coil one termination A.C. contactor main contacts, current transformer LH just
Another termination bidirectional triode thyristor SCR of level coil anode, bidirectional triode thyristor SCR negative electrode connect the phase winding of motor, enter
The electric current of current transformer LH primary coil is phase current；
Described triggers circuit includes current transformer LH secondary coil, triode T1, triode T2, optocoupler GE1, electricity
Current transformer LH secondary coil is connected with the input of a bridge rectifier QL1, the negative pole of bridge rectifier QL1 output end
Ground connection, the positive pole of bridge rectifier QL1 output end connect triode T1 base stage, and triode T1 base stage is connect by resistance R2
Ground, triode T1 emitter stage connect potentiometer W1 cursor slide, and a potentiometer W1 termination filter power supply VD1, potentiometer W1's is another
One end is grounded, and triode T1 colelctor electrode connects triode T2 base stage by resistance R1, and triode T2 colelctor electrode passes through resistance
R3 meets voltage-stabilized power supply VD2, and triode T2 emitter stage connects the anode of optocoupler GE1 light emitting diode, optocoupler GE1 light-emitting diodes
The minus earth of pipe, one end of optocoupler GE1 optoelectronic controlled silicon connect bidirectional triode thyristor SCR anode by resistance R4, and photoelectricity can
Control another termination bidirectional triode thyristor SCR of silicon control pole；
Diode D1 anode is connected with the positive pole of full-wave rectifier QL1 output ends, and diode D1 negative electrode passes through electric capacity
C1 is grounded, and the tie point between diode D1 negative electrode and electric capacity C1 is filter power supply VD1；
A resistance R5 termination filter power supply VD1, resistance R5 another termination voltage-stabiliser tube DW1 negative electrode, voltage-stabiliser tube DW1's
Plus earth.
The characteristics of the utility model is that electricity-saving appliance only has the other elements of two lead ends and switch cubicle easy to connect.
The phase current i of motor is converted to corresponding voltage by current transformer in electricity-saving appliance, the rectified electricity of the voltage
Full wave voltage Ui is obtained after the rectification of road, full wave voltage Ui obtains smooth filtering voltage VD1 by filtering, to filtering voltage VD1
A reference voltage Ug is obtained after partial pressure, full wave voltage Ui compared with reference voltage Ug, when full wave voltage Ui trailing edge or
When rising edge is less than reference voltage Ug, the pulse signal of triggering controllable silicon is produced, when the power factor of motor reduces, triggering
The pulse signal of controllable silicon can also lag generation, reduce the angle of flow of controllable silicon, and the terminal voltage of motor reduces, motor
Power factor rises.It economizes on electricity up to 20%.
Electricity-saving appliance eliminates traditional phase detecting circuit, while provides synchronizing signal and power supply using current transformer,
So that the electronic line structure of electricity-saving appliance simplifies significantly.Reduce production cost.
Brief description of the drawings
Fig. 1 is electrical main connecting wire schematic diagram of the present utility model.
Fig. 2 is the electrical schematic diagram of electricity-saving appliance.
Fig. 3 is the electric control circuit figure of motor.
When Fig. 4 is nominal load in electricity-saving appliance interdependent node oscillogram.
Fig. 5 is the oscillogram of interdependent node in electricity-saving appliance when gently loading.
Embodiment
In conjunction with brief description of the drawings specific embodiment of the present utility model.
A kind of electricity-saving control cabinet of motor, for controlling the operation of motor, described motor is that three-phase alternating current is different
Motor is walked, it includes A phase, B phase, C phase bus end, and being linked in sequence at each phase bus end has the master of fuse, A.C. contactor
Contact CJ1, electricity-saving appliance JDQ is connected between the main contacts of A.C. contactor and motor MD phase winding；The electricity-saving appliance of each phase
Structure is identical.
Described electricity-saving appliance includes bidirectional triode thyristor SCR, current transformer LH and triggers the triggering electricity of controlled silicon conducting
Road, the main contacts of a termination A.C. contactor of current transformer LH primary coil, current transformer LH primary coil
Another termination bidirectional triode thyristor SCR anode, bidirectional triode thyristor SCR negative electrode connect the phase winding of motor.
Described triggers circuit includes current transformer LH secondary coil, triode T1, triode T2, optocoupler GE1, electricity
Current transformer LH secondary coil is connected with the input of a bridge rectifier QL1, the negative pole of bridge rectifier QL1 output end
Ground connection, the positive pole of bridge rectifier QL1 output end connect triode T1 base stage, and triode T1 base stage is connect by resistance R2
Ground, triode T1 emitter stage connect potentiometer W1 cursor slide, and a potentiometer W1 termination filter power supply VD1, potentiometer W1's is another
One end is grounded, and triode T1 colelctor electrode connects triode T2 base stage by resistance R1, and triode T2 colelctor electrode passes through resistance
R3 meets voltage-stabilized power supply VD2, and triode T2 emitter stage connects the anode of optocoupler GE1 light emitting diode, optocoupler GE1 light-emitting diodes
The minus earth of pipe, one end of optocoupler GE1 optoelectronic controlled silicon connect the anode of controllable silicon SCR, optoelectronic controlled silicon by resistance R4
Another termination controllable silicon SCR control pole；
Diode D1 anode is connected with the positive pole of full-wave rectifier QL1 output ends, and diode D1 negative electrode passes through electric capacity
C1 is grounded, and the tie point between diode D1 negative electrode and electric capacity C1 is filter power supply VD1；
A resistance R5 termination filter power supply VD1, resistance R5 another termination voltage-stabiliser tube DW1 negative electrode, voltage-stabiliser tube DW1's
Plus earth, voltage-stabiliser tube DW1 negative electrode is voltage-stabilized power supply VD2；
In the anode that the one of optoelectronic controlled silicon is terminated with diode D2, diode D2 negative electrode connects photoelectricity by electric capacity C2 can
Control the other end of silicon.
In triggers circuit, the voltage of the positive pole of bridge rectifier QL1 output ends is full wave voltage Ui, and its waveform is continuous
Sine wave upper half, as shown in curve 4 in Fig. 4；Filter power supply VD1 waveform is straight line, as shown in curve 3 in Fig. 4；
Filter power supply VD1 forms a reference voltage Ug after potentiometer W1 partial pressures, by triode T1 reference voltages Ug with
Full wave voltage Ui is compared, when full wave voltage Ui rising edge or trailing edge are less than reference voltage Ug, triode T1 collection
Electrode current produces a pulse signal T, as shown in waveform 5 in Fig. 4；Pulse signal T amplifies through triode T2, makes optocoupler GE1's
The dash area of curve 6 in optoelectronic controlled silicon conducting, optoelectronic controlled silicon triggering controllable silicon SCR, the region of controlled silicon conducting such as Fig. 4
It is shown.
When the load of motor reduces, power factor declines, the phase current i waveforms of motor（Curve 2 in Fig. 5）Relatively
The phase voltage u waveforms of civil power（Curve 1 in Fig. 5）Move to right, because trigger pulse T and phase current i are synchronous, trigger pulse T
Move to right, the angle of flow of controllable silicon reduces, and the region of controlled silicon conducting is as shown in the dash area of curve 6 in Fig. 5；The end of motor
Voltage declines, and the exciting current of motor declines, and power factor rises.
Described triode T1 is PNP type triode, and triode T is NPN type triode, optocoupler GE1 model
TLP525G or TLP3052.
Potentiometer W1 adjustable reference voltage Ug are adjusted, reference voltage Ug is higher, and pulse signal T is wider, by adjusting electricity
Position device W1 can make the angle of flow of the bidirectional triode thyristor SCR under rated load operation state close to 180 degree.
Using reference voltage Ug compared with full wave voltage Ui, pulse signal T width can be made stable.
Resistance R5, voltage-stabiliser tube DW1 form mu balanced circuit, make stable by the electric current of photodiode.
Resistance R4, diode D2, electric capacity C2 provide a precharge trigger signal for bidirectional triode thyristor SCR；Its principle is triggering electricity
The power supply on road is provided by current transformer, bidirectional triode thyristor SCR and is not turned on when motor is initially powered, current transformer without
Electric current flows through, and positive charge is carried out to electric capacity C2 by resistance R4, diode D2, charging current is into bidirectional triode thyristor SCR's
Control pole triggers bidirectional triode thyristor SCR, and charging circuit time constant, which is more than 20 milliseconds, can ensure that bidirectional triode thyristor SCR is turned on, double
Triggers circuit normal work after being turned on to controllable silicon SCR.Because diode D2 anti-phase resistance is very big, electric capacity C2 is difficult to discharge,
The electric current very little to charge again, it is difficult to trigger bidirectional triode thyristor again, do not interfere with the normal work of triggers circuit so.Certainly
Precharge trigger signal can also be completed by a button, and button is in parallel with optoelectronic controlled silicon, and button is drawn by lead, and motor is powered
After press button, then unclamp, it is but so inconvenient for operation.
Voltage-stabiliser tube DW2 negative electrode meets filter power supply VD1, and voltage-stabiliser tube DW2 anode is grounded by the coil J of relay；When
When filter power supply VD1 is increased to certain value with the electric current of motor, voltage-stabiliser tube DW2 conductings, the coil J of relay is powered, relay
The normally-closed contact J1 actions of device（Open）, output overcurrent signal, overcurrent protection can be achieved.
Fig. 1 show the structure of motor delta connection, a termination A phase electricity-saving appliances of its A phase winding, A phase windings
Another termination B phase main contacts；One termination B phase electricity-saving appliances of B phase windings, another termination C phase main contacts of B phase windings；C phase windings
One termination C phase electricity-saving appliances, another termination A phase main contacts of B phase windings；It is phase current so into the electric current of electricity-saving appliance.
When motor is star connection, accompanying drawing is not drawn into, a termination A phase electricity-saving appliances of its A phase winding, B phase windings
One termination B phase electricity-saving appliances, a termination C phase electricity-saving appliances of C phase windings, the other end of A, B, C phase winding are in parallel.So enter section
The electric current of electrical equipment is also phase current.
Motor electric control circuit include stop button TA, start button QA, A.C. contactor coil CJ and after
The normally-closed contact J1 of electrical equipment, stop button TA a termination B phase lines, stop button TA other end order pass through start button
QA, the coil CJ of A.C. contactor and relay normally-closed contact J1 connect C phase lines, and exchange is wherein parallel with start button QA
The normally opened contact CJ2 of contactor.Described normally-closed contact J1 can be in three electricity-saving appliances the normally-closed contact of relay be composed in series,
Also it is the normally-closed contact of some relay.
The operating process of switch cubicle is to press start button QA, the coil CJ of A.C. contactor obtain it is electric, A.C. contactor
Main contacts CJ1 is closed, and the normally opened contact CJ2 closures of A.C. contactor, motor rotation, presses stop button TA, ac contactor
The main contacts CJ1 of device is opened, motor stalling；When electric current is increased to certain value in motor operation course, relay it is normal
Closed contact J1 is opened, the coil CJ dead electricity of A.C. contactor, disconnects the power supply of motor.
Claims (3)
1. a kind of electricity-saving control cabinet of motor, for controlling the operation of motor, described motor is phase asynchronous
Motor, it includes fuse, the main contacts of A.C. contactor of each phase sequence connection, in main contacts and the electricity of A.C. contactor
Electricity-saving appliance is connected between the phase winding of motivation, the structure of each electricity-saving appliance is identical；
It is characterized in that described electricity-saving appliance includes bidirectional triode thyristor SCR, current transformer LH and triggers touching for controlled silicon conducting
Power Generation Road, the main contacts of a termination A.C. contactor of current transformer LH primary coil, current transformer LH primary line
Another termination bidirectional triode thyristor SCR of circle anode, bidirectional triode thyristor SCR negative electrode connects the phase winding of motor, into electric current
The electric current of transformer LH primary coil is phase current；
Described triggers circuit includes current transformer LH secondary coil, triode T1, triode T2, optocoupler GE1, and electric current is mutual
Sensor LH secondary coil is connected with the input of a bridge rectifier QL1, and the negative pole of bridge rectifier QL1 output end connects
Ground, the positive pole of bridge rectifier QL1 output end connect triode T1 base stage, and triode T1 base stage is grounded by resistance R2,
Triode T1 emitter stage connects potentiometer W1 cursor slide, a potentiometer W1 termination filter power supply VD1, the potentiometer W1 other end
Ground connection, triode T1 colelctor electrode connect triode T2 base stage by resistance R1, and triode T2 colelctor electrode is connect by resistance R3
Voltage-stabilized power supply VD2, triode T2 emitter stage connect the anode of optocoupler GE1 light emitting diode, optocoupler GE1 light emitting diode
Minus earth, one end of optocoupler GE1 optoelectronic controlled silicon connect bidirectional triode thyristor SCR anode, optoelectronic controlled silicon by resistance R4
Another termination bidirectional triode thyristor SCR control pole；Optocoupler GE1 model TLP525G or TLP3052；
Diode D1 anode is connected with the positive pole of full-wave rectifier QL1 output ends, and diode D1 negative electrode is connect by electric capacity C1
Ground, diode D1 negative electrode is filter power supply VD1；
A resistance R5 termination filter power supply VD1, resistance R5 another termination voltage-stabiliser tube DW1 negative electrode, voltage-stabiliser tube DW1 anode
Ground connection, voltage-stabiliser tube DW1 negative electrode is voltage-stabilized power supply VD2.
2. a kind of electricity-saving control cabinet of motor according to claim 1, it is characterized in that, in a termination of optoelectronic controlled silicon
There is diode D2 anode, diode D2 negative electrode connects the other end of optoelectronic controlled silicon by electric capacity C2.
3. a kind of electricity-saving control cabinet of motor according to claim 1, it is characterized in that, described filter power supply VD1 with
Voltage-stabiliser tube DW2 negative electrode connection, voltage-stabiliser tube DW2 anode is grounded by the coil J of relay, when filter power supply VD1 is increased to
During certain value, voltage-stabiliser tube DW2 conductings, the coil J of relay is powered, and the normally-closed contact J1 action output overcurrents signal of relay is extremely
The electric control circuit of motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721091209.9U CN207117520U (en) | 2017-08-29 | 2017-08-29 | A kind of electricity-saving control cabinet of motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721091209.9U CN207117520U (en) | 2017-08-29 | 2017-08-29 | A kind of electricity-saving control cabinet of motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207117520U true CN207117520U (en) | 2018-03-16 |
Family
ID=61585669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721091209.9U Expired - Fee Related CN207117520U (en) | 2017-08-29 | 2017-08-29 | A kind of electricity-saving control cabinet of motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207117520U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107493053A (en) * | 2017-08-29 | 2017-12-19 | 高玉琴 | A kind of electricity-saving control cabinet of motor |
| CN111106782A (en) * | 2020-01-20 | 2020-05-05 | 河北兴邦电力器材有限公司 | Ultra-high slip motor control apparatus |
| CN111193455A (en) * | 2020-01-20 | 2020-05-22 | 河北兴邦电力器材有限公司 | Ultra-high slip motor control method, device, storage medium and electronic apparatus |
-
2017
- 2017-08-29 CN CN201721091209.9U patent/CN207117520U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107493053A (en) * | 2017-08-29 | 2017-12-19 | 高玉琴 | A kind of electricity-saving control cabinet of motor |
| CN111106782A (en) * | 2020-01-20 | 2020-05-05 | 河北兴邦电力器材有限公司 | Ultra-high slip motor control apparatus |
| CN111193455A (en) * | 2020-01-20 | 2020-05-22 | 河北兴邦电力器材有限公司 | Ultra-high slip motor control method, device, storage medium and electronic apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202025037U (en) | Zero crossing detecting circuit | |
| CN207117520U (en) | A kind of electricity-saving control cabinet of motor | |
| CN202794915U (en) | Isolation-type zero standby power consumption circuit | |
| CN105305857B (en) | Capacitance-type switch security isolation programmable power supply circuit | |
| CN201623677U (en) | Control circuit of single-phase alternating-current motor for clothes dryers | |
| CN107493053A (en) | A kind of electricity-saving control cabinet of motor | |
| CN207117522U (en) | Current control formula electric motor electricity saver | |
| CN208462091U (en) | A kind of series resonance work efficiency adjustment system | |
| CN203800561U (en) | Three-phase self-reset over-voltage and under-voltage protector based on single chip microcomputer | |
| CN107302331A (en) | Current trigger formula electric motor electricity saver | |
| CN205160399U (en) | A power supply unit for elevator band -type brake coil | |
| CN205721473U (en) | A kind of Multifunctional AC power regulation circuit | |
| CN207200608U (en) | The electric motor electricity saver of harmonic wave can be reduced | |
| CN207117523U (en) | Current trigger formula electric motor electricity saver | |
| CN207200609U (en) | Flow-regulating type electric motor electricity saver | |
| CN109818412A (en) | A kind of controller and method for realizing twin voltage input | |
| CN203883721U (en) | Oil pumping machine self-starting permanent magnet synchronous motor compensating type voltage regulator | |
| CN208571967U (en) | A kind of intelligence control system of excitation chopper | |
| CN105305813B (en) | Frequency-variable kitchen ventilator | |
| CN205453260U (en) | Boundary switch controller super capacitor charging circuit | |
| CN107425777A (en) | Flow-regulating type electric motor electricity saver | |
| CN203243260U (en) | Soft-start controller for three-phase motor | |
| CN103779831A (en) | Self-recovery over-voltage and under-voltage protection device based on single-chip microcomputer | |
| CN204425305U (en) | Two-wire system electronic switch | |
| CN208820474U (en) | Simple AC voltage-stabilizing circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180316 Termination date: 20200829 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |